Unlike the other sources where you have to manually install the mod, Steam does this automatically if you use the Steam Client, and you can download simply by clicking the 'Subscribe' button on a mods page. The Steam client has a built in means of downloading and installing mods, and is possibly one of the safest means of getting mods. Bear in mind that while some are not perfect, these are still the best places to find mods. Each has a 'Danger Rating', this being the likelihood (or lack thereof) of viruses being disguised as mods on these websites. This is a list of websites where mods are typically posted, and where it is recommended to download mods. Different mods change different parts of the game, so some mods can conflict with other mods and result in a crash, bizarre functionality, or glitches. It is also possible to corrupt save files or make the game crash. Below is a list of sources where it is recommended to find Civilization VI mods. Somebody may claim that a website has a mod, but instead will install a virus on your computer. DO NOT download files on the internet without certainty of what it is and what it does. Modding, if you do not know what you are doing, can be dangerous. 5 Lists of Popular Civilization VI Mods.2.3 CivFanatics Civilization VI Creation & Customization Sub-forum.